Crystal structure of trans-diaquabis(4-cyanobenzoato-κO)bis(N,N-diethylnicotinamide-κN)zinc(II)

Abstract

In the title complex, [Zn(C8H4NO2)2(C10H14N2O)2(H2O)2], the ZnII cation, located on an inversion centre, is coordinated by two water molecules, two 4-cyanobenzoate (CB) anions and two diethylnicotinamide (DENA) ligands in a distorted N2O4 octahedral geometry. In the molecule, the dihedral angle between the planar carboxylate group and the adjacent benzene ring is 9.50 (14)°, while the benzene and pyridine rings are oriented at a dihedral angle of 56.99 (5)°. The water molecules exhibit both an intramolecular hydrogen bond [to the non-coordinating carboxylate O atom, enclosing an S(6) hydrogen-bonding motif, where O...O = 2.6419 (19) Å] and an intermolecular hydrogen bond [to the amide carbonyl O atom, enclosing an R22(16) ring motif, where O...O = 2.827 (2) Å]; the latter lead to the formation of supramolecular chains propagating along the [110] direction.

Keywords

• crystal structure
• zinc complex
• benzoate
• nicotinamide derivatives